The Emperor Epithermal Gold Deposit, Vatukoula, Fiji

Antonio M, ; Davis B, ; Jones GFP, ; Setterfield TN, ; Tua P,
Organization: The Australasian Institute of Mining and Metallurgy
Pages: 4
Publication Date: Jan 1, 1987
The Emperor gold deposit occurs on the western margin of a 5 Ma caldera in a large, mafic shoshonitic shield volcano on the island of Viti Levu, Fiji. Products from two major pulses of post-caldera intermediate volcanism filled the caldera. Caldera collapse-related steep and flat faults and zones of shattered rock provided per- meable conduits for vertical and lateral fluid migration and favourable sites for ore deposition. One large hydrothermal system, operating concurr- ently with extrusion of the second pulse of resurgent volcanism, may have produced porphyry- style alteration within the caldera, epithermal mineralization at Vatukoula, and weakly minera- lized, siliceous veins and breccias in an outflow zone northeast of Vatukoula.
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